Ben Lopatin

Currently using the dummy cache backend results in AttributeErrors, `'NoneType' object has no attribute 'get'`.

This will require reworking how the base metaclasses are constructed.

E.g. here https://github.com/bennylope/macbook-ansible/blob/97ecd4353d5208d3346ca0d44b65d9fa9aa1645b/ansible.cfg

Stop testing on Python 3.6, 3.5